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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 541 · 40 sums
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The method (Know the totals): Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°. On a straight line: the two angles add up to 180°. In a triangle: the three angles add up to 180°. Around a point: 360°. Clock: each hour mark is 30° apart (360° ÷ 12).

NameDateTime takenScore ___ / 40
  1. 1.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 45° and 115°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  7. 7.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  8. 8.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  10. 10.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  13. 13.Two angles of a triangle are 55° and 75°. What is the third angle (in degrees)?
  14. 14.An angle measures 95°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  15. 15.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  26. 26.An angle measures 165°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  27. 27.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  32. 32.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  33. 33.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 45° and 50°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 40° and 60°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?

Answer key

  1. 210
  2. 50
  3. 25
  4. 20
  5. 130
  6. 35
  7. Acute
  8. 15
  9. Right
  10. Acute
  11. 230
  12. 60
  13. 50
  14. Obtuse
  15. 85
  16. 230
  17. 140
  18. 120
  19. 5
  20. 10
  21. 30
  22. 75
  23. 75
  24. 105
  25. 95
  26. Obtuse
  27. 70
  28. 80
  29. 250
  30. 200
  31. 180
  32. Acute
  33. 170
  34. 120
  35. 85
  36. 5
  37. 80
  38. 120
  39. 60
  40. 30

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